Hi Paula, wich CRM version you have? OnPremise or OnLine? because somethimes when your CRM OnPremise has not the new rollups and internet explorer (if you use this one, is on the newest versión the CRM begins to have issues like that.

So first check out that and by logic you should have Explorer 11. So check the roll up of your ONPREMISE Dynamics CRM.

If you're working with OnLine versión, mmm i would think that someone has modifiy the view of the accounts/contacts or you have to set up the Security roles of that users. Give them read permissions; read and usually share or add (This apply to OnPremise Too).

CRM Limits each page to 250 records maximum. Are you trying to manipulate the data?

If you need to edit the data, simply run an advanced find and select: Export Contacts, then make the boxes as shown here:

Doing this will export all of the records into an XML file. Save that file somewhere on your PC, other than the Downloads folder. Once saved, open up a blank Excel Document and simply drag that XML file into the blank Excel Spreadsheet and it will open up the XML file.

If you just need to view the data and not edit it, simply check only the "Static Worksheet with records from all pages in the current view."

Its a Outlook troubleshoot? in that way check out the filters of the outlook, in the image that you upload really? you can't see anything?... Maybe something with SP in the users Machines, but well try that, works with offline version to see if anything changes...

Then, are you sure to you have configurated correctly the security roles for that users? ... still in case if you don't have permissions the crm tell's you in the grid... and what about the cal license for that users, what type is it? check that in the user administration.